Robust $s_{\pm }$-wave pairing in a bilayer two-orbital model of pressurized La${}_3$Ni${}_2$O${}_7$ without the $\gamma$ Fermi surface

Yi Gao

We studied the superconducting pairing symmetry based on a newly constructed tight-binding model of La${}_3$Ni${}_2$O${}_7$ under pressure, where the $\gamma$ band sinks below the Fermi level…